X-Chair X3 vs SIHOO Doro S100

Side by side from official specifications, sourced prices and User Insights. No written comparison exists for this pair yet.

X-Chair

X-Chair X3

$979

SIHOO

SIHOO Doro S100

$499.99 – $509.99

$479.01

lower starting price for SIHOO Doro S100 than X-Chair X3 at the brand stores

Differences at a glance

X-Chair X3SIHOO Doro S100

Price: $979$499.99 – $509.99
Seat height: 17.69–22 in46–54 cm
Seat depth: 16.75–19.25 in15.15–17.12 in (≈ 38.5-43.5 cm)
Load capacity: 275 lb (125 kg)330 lb (≈ 150 kg)
Recline: SciFloat Infinite Recline + Tilt Lock and Tension allows you to recline and lock into position or increase tension in your recline motion for more fluid movement.Reclines up to 135°
Arms: 4-Dimensional armrests come standard (up, down, side-to-side, front-to-back); option to upgrade to FS 360 rotational armrests; Armrest Height 5.875in - 8.875in4D coordinated armrests (Up and down, left, right, forward and backward, tilt linkage); Up and down 2.76 in, forward and back 1.18 in, side to side, rotate 72°
Headrest: Optional add-on (standard configuration: No headrest; Headrest +$115)Integrated headrest adjusts up or down; upper backrest in five levels
Lumbar support: Dynamic Variable Lumbar (DVL)® Support; height adjustable backrest raises the DVL®Dual dynamic lumbar support
Warranty: 5 years (all parts and materials); 15 years (non-moving metal components, chair frame)3 years

Which is cheaper, the X-Chair X3 or the SIHOO Doro S100?

The SIHOO Doro S100 is cheaper to start: $499.99 versus $979 for the X-Chair X3 at the brand stores (Sep 2026).

Which has a higher weight capacity?

The SIHOO Doro S100, rated for 330 lb versus 275 lb for the X-Chair X3.

Which has a headrest?

Both: the X-Chair X3 as an option and the SIHOO Doro S100 as standard.